Please answer urgently :
26.The following figure shows the variation of intensity of magnetisation versus the applied magnetic field intensity, Hj for two magnetic materials A and B:

(a) Identify the materials A and B.
(b) Why does the material B have a larger susceptibility than A for a given field at constant temperature?

(a)

Material A : Diamagnetic  (since the slope of I and H curve is small)

Material B: Paramagnetic ( since the slope of I and H curve is big)

(b)

Reasons for larger susceptibility of B:
  • It is a paramagnetic substance
  • It has more tendency to pull magnetic lines of force in the presence of magnetic field

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